package com.cjf.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cjf.dto.DishDto;
import com.cjf.comon.R;
import com.cjf.entity.Category;
import com.cjf.entity.Dish;
import com.cjf.entity.DishFlavor;
import com.cjf.service.CategoryService;
import com.cjf.service.DishFlavorService;
import com.cjf.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

/***
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    /***
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");
    }

    /***
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);

        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();

            //对象拷贝 除categoryName属性 其他属性都可从Dish拷贝
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//菜品分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            //通过对象属性 查询分类名称
            String categoryName = category.getName();

            //将查询的分类名称 赋值给DishDto对象
            dishDto.setCategoryName(categoryName);

            return dishDto;

            //转集合操作
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /***
     * 根据id查询菜品信息和口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        //调用
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /***
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request ,@RequestBody DishDto dishDto) {
        Long empId = (Long) request.getSession().getAttribute("employee");
        dishDto.setUpdateTime(LocalDateTime.now());
        dishDto.setUpdateUser(empId);
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品信息成功");
    }

    /***
     * 修改菜品状态 批量修改
     * @param ids
     * @param status
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> update(@RequestParam List<Long> ids,@PathVariable Integer status) {
        System.out.println("---------------------------------------");
        System.out.println(status);
        List<Dish> new_dish = new ArrayList<>();
        new_dish = ids.stream().map(new Function<Long, Dish>() {
            @Override
            public Dish apply(Long id) {
                Dish dish = new Dish();
                dish.setId(id);
                dish.setStatus(status);
                return dish;
            }
        }).collect(Collectors.toList());

        dishService.updateBatchById(new_dish);

        return R.success("修改状态成功!");
    }


    /***
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish) {
//
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null , Dish::getCategoryId,dish.getCategoryId());
//        //查询状态为1 （即为起售状态的套餐）
//        queryWrapper.eq(Dish::getStatus,1);
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null , Dish::getCategoryId,dish.getCategoryId());
        //查询状态为1 （即为起售状态的套餐）
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        List<DishDto> dishDtoList = list.stream().map((item) -> {

            DishDto dishDto = new DishDto();

            //对象拷贝 除categoryName属性 其他属性都可从Dish拷贝
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//菜品分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            //通过对象属性 查询分类名称
            String categoryName = category.getName();

            //将查询的分类名称 赋值给DishDto对象
            dishDto.setCategoryName(categoryName);

            Long dishId = item.getId();//当前菜品的id

            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);

            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavors);
            return dishDto;

            //转集合操作
        }).collect(Collectors.toList());

        return R.success(dishDtoList);
    }


    /***
     *删除菜品 批量删除
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        dishService.removeWithDish(ids);
        return R.success("菜品删除成功！");
    }
}
